Loom harness mechanism.



G. HETHERINGTON.

LOOM HARNESS MECHANISM.

APPLIOATION IILBD AUG. 20, 1910.

1,003,742. I Patented Sept. 19,1911.

INVENTOR:

W W Gav/F6: lvsr/rsk/A/arom UNITED STATES GEORGE HETHERINGTON, OF PHILADELPHIA, PENNSYLVANIA.

LOOM HARNESS MECHANISM.

Application filed August 29,

Specification of Letters Patent.

Patented Sept. 19, 1911.

1910. Serial No. 579,508.

To all whom it may concern: a

Be it known that I, GEORGE I-IETHERING- TON, of Philadelphia, in the State of Pennsylvania, have invented a certain new and useful Improvement in Loom Harness Mechanism, whereof the following is a specification, reference being had to the accompanying drawing.

My invention relates to mechanism particularly adapted for weaving doup or gauze fabric, and, as hereinafter described, includes the combination with a pair of harness jack levers; of means arranged to oscillate one of said levers back and forth twice while the other is oscillated back and forth once; such means comprising two intermeshed gears, one larger than the other, links respectively connecting said gears with said levers, and, means arranged to turn the larger gear back and forth less than one revolution. Said lever thus connected to the larger gear is moved the full distance to make the shed while the lever thus connected with the smaller gear is moved approximately one half that distance; the half and return motion of the one lever being effected during each move ment of the other lever in either direction.

My invention includes the various novel features of construction and arrangement hereinafter more definitely specified.

In said drawing; Figures I and II are elevations of harness mechanism of the Knowles type conveniently embodying my invention and respectively showing the same in opposite extreme positions.

In said figures; the bars 1 and 2 are secured in the frame of the loom, and the pair of harness jack levers 3 and 4: are mounted upon said bar 1 to oscillate on a common axis in opposition to the single vibrator lever 6 which is mounted upon the'bar 2. Said lever '6 has the stud shaft 7 carrying the main gear 8 and also has the stop lug 10 extending in the sectoral annular slot 11 in said gear. Said gear 8 has the eccentric pin 12 pivotally connected with the link 14 which is pivotally connected with the pin 15 on said lever 3, and, said gear 8 is arranged to be turned more than one half and less than one revolution, back and forth, so that said lever 3 is shifted, back and forth, from the position shown in Fig. I to the position shown in Fig. II, being the full distance to make the shed. Said vibrator lever also has the stud shaft 16 carrying the auxiliary gear 20 intermeshed with said main gear 8. Said gear 20 has the eccentric pin 22 pivotally connected with the link 23 which is pivotally connected with the pin 26 on the jack lever 4:. Said link 23 being detachably connected with said pin 26 is conveniently provided with the weight extension 27 which normally retains it in engagement therewith as shown. The proportion of said gears 8 and 20 is such that the gear 20 is turned slightly more than one revolution by each semi-revolution of the gear 8, and, the cooperative result is that the jack lever 3 is shifted back and forth to the extent indicated in the drawing, being the full distance required to make the shed, and, during each such movement, back or forth, said jack lever 4. is shifted both back and forth, approximately one half that distance. Said gear 8 is turned alternately in opposite directions to the extent of said slot 11 by alternate engagement with the gears 30 and 31 which are mounted to rotate respectively above and below it in the loom frame and provided with teeth only upon one half of their circumference; such alternate engagement being effected by a chain or other pattern device having projections which engage the flange 32 on the vibrator lever 6 and thus lift the gear 8 into engagement with the driving gear 30 or lower it into engagement with the driving gear 31. It is to be understood that the driving mechanism for the gear 8, above described, is of ordinary construction and forms no part of my present invention as any other suitable means may be employed to efiect the described turning movement of said gears 8 and 20. Moreover, it may be observed that although the gear 20 is so meshed with the gear 8 that the oscillatory movement of the lever 4 is effected at the left hand extreme of the movement of the lever 3, said gear 20 may be removed from the stud shaft 16, turned a half revolution and reengaged with said gear 8, so as to effect the oscillatory movement of the lever 4 at the right hand extreme of the moveeccentric pin 12 below the center of rotation of said gear so that stress upon said link in the direction of its length tends to lock said gear in stationary position against the stop lug 10 and thus prevent accidental rotation of said gear 8. Moreover, said gear 20 being turned slightly more than one revolution the link 23 comes to rest with the eccentric pin 22 respectively above and below the center ofsaid gear 20 in the two extremes of its position so that stress upon said link 23 in the direction of the lever 4 tends to maintain the gear 8 in the locked position aforesaid. I

I do not desire to limit myself to the precise details of construction and arrangement herein set forth, as it isobvious that various modifications may be made therein without departing from the essential features of my invention as defined in the appended claims.

I claim 1. In loom harness mechanism, the combination with two jack levers arranged to oscillate upon a common axis stationary in the loom; of a single vibrator lever, common to said two jack levers, arranged to oscillate upon an axis stationary in said loom and having twostud shafts and a, stop lug; a gear carried by said vibrator lever on one of said stud shafts and having a sectoral annular slot engaging said lug; an eccentric pivot pin on said gear; a link connecting said gear pivot pin with a pivot pin on one of saidja'ck levers; a smaller gear carried by said vibrator lever on the other of said stud shafts in engagement with said first gear; an eccentric pivot pin'on saidrsmaller gear; a link connecting said smaller gear pivot pin with a, pivot pin on the other of said harness jack levers; and means arranged to rotate said larger gear alternatelyin opposite directions to the extent of said slot; whereby, one of said jack levers is oscillatedv in accordance with the movement of said larger gear the full distance to, make the shed, and, the other of said jack levers is turned in one direction and returned in the opposite direction during each movement, of the first named jack lever in each direction.

2. In loom harness mechanism, the combination with two jack levers having a common axis of oscillation; of a vibrator lever arranged to oscillate upon an axis stationary in said loom and carrying two intermeshed gears of dilferent sizes; links respectively connecting said gears with the respective jack levers; and, means arranged to turn the larger one of said gears back and forth approximately one half revolution; whereby, the jack lever linked to said larger gear is oscillated the full distance to make a shed, and, the jack lever linked to said smaller gear is oscillated approximately one half of said distance twice during each oscillation of the other jack lever.

3. In a loom harness mechanism, the combination with two jack levers; of a single vibrator lever, commonto said two jack levers, having a stop lug; a gear carried by said vibrator lever having a sectoral annular slot engaging said lug; an eccentric pivot on said gear; a link connecting said gear pivot with a pivot on one of said jack levers;

a smaller gear carried by said vibrator lever in engagement with said first gear; an eccentric pivot on said smaller gear; a link connecting said smaller gear pivot witha pivot on the other of said jack levers; and, means arranged to rotate said larger gear alternately in opposite directions to the extent of said slot; whereby, both of saidjack levers are oscillated.

4. In a loom harness mechanism, the combination with two jack levers; of a single vibrator lever, common to said two jack levers, having a stop lug; a gear carried by said vibrator lever having a sectoral annular slot engaging said lug; an eccentric pivot on said gear; a link connecting said gear pivot with a pivot on one of said jack levers; a second gear carried by said vibrator leverin engagement with said first gear; an eccentric pivot on said second gear; a link connecting said second gear pivot with a pivot on the other of said ack levers; and, means arranged to rotate said first gear alternately in opposite directions to the extent of said slot; whereby, both of said jack levers are oscillated.

5. In a loom harness mechanism, the combination with two jack levers; of asingle vibrator lever, common to said two jack levers; a gear carried by said vibrator lever having means to. engage said lever to limit the motion of said gear; an eccentric pivot on said gear; alink connecting said gear pivot with a pivot on one of said jack levers; a second gear carried by said vibrator lever in engagement with said first gear; an, eccentric pivot on said second gear; a link connecting said second gear'pivot with a pivot on the other of said jack levers; and, means arranged to turn said larger gear alternately in opposite directions; whereby, both of said jack levers are oscillated.

6. In a loom harness mechanism, the combination with two jack levers; of a single vibrator lever, common to said two jack levers; two gears carried by said vibrator lever in engagement with each other; means operatively connecting the respective gears with the respective jack levers, arranged to oscillate the latter; cylinder gears respec tively above and below said vibrator lever; and, means whereby said vibrator lever may be raised and lowered to bring its gears into operative connection with the respective cylinder gears.

7. In a loom harness mechanism, the combination with two jack levers; of a single vibrator lever, common to said two jack levers; and, intermeshed gears carried by said vibrator lever operatively connected with the respective jack levers; whereby the latter are differentially oscillated in cooperative relation.

8. In a loom harness mechanism, the combination with two jack levers; of a single vibrator lever, common to said two jack levers; and, intermeshecl gears carried by said vibrator lever operatively connected with the respective jack levers; whereby the latter are oscillated in cooperative relation.

9. In a loom harness mechanism, the combination with two jack levers; of a single vibrator lever, common to said two jack levers; and, means carried by said vibrator lever operatively connected with the respective jack levers; whereby the latter are oscillated in cooperative relation.

In testimony whereof, I have hereunto signed m name at Philadelphia, Pennsylvania, this twenty-seventh day of August,

GEORGE HETHERINGTON. Witnesses:

ARTHUR E. PAIGE, GERTRUDE N. R. MATTSON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of ZPatents, Washington, D. C. 

